Control method, device and system for motorcycle twin-cylinder engine

Abstract

The present application relates to a control method, device, system, storage medium and computer program product for a motorcycle twin-cylinder engine. The method comprises: when the motorcycle engine is in a starting condition, detecting missing teeth on the crankshaft of the motorcycle; when the missing teeth are detected, determining the first left cylinder stroke information corresponding to the left cylinder of the motorcycle engine and the first right cylinder stroke information corresponding to the right cylinder of the motorcycle engine based on the missing tooth predicted position of the missing teeth; determining whether the current stroke of the engine meets the initial operating condition based on the first left cylinder stroke information and the first right cylinder stroke information; if it is determined that the initial operating condition is met, controlling the twin-cylinder engine to perform a single fuel injection and two ignitions in each working cycle. The use of this method can improve fuel utilization and save fuel.

Description

Technical Field

[0001] The present application relates to the technical field of motorcycles, and in particular to a control method, device, system, storage medium and computer program product for a twin-cylinder motorcycle engine. Background Art

[0002] With the development of motorcycle technology, the emission regulations for motorcycles are becoming more and more stringent. The power output of the engine is achieved by injecting fuel during the working stroke of the engine through an electronically controlled gasoline injection system.

[0003] However, before the engine stroke is determined, the traditional fuel injection method is to perform two fuel injections in each working cycle of the engine. Since the gasoline injected during the power or compression stroke easily adheres to the wall of the intake duct and is difficult to enter the cylinder for effective utilization, it will cause increased emissions and lead to fuel waste. Summary of the invention

[0004] Based on this, it is necessary to provide a control method, device, system, computer-readable storage medium and computer program product for a motorcycle twin-cylinder engine that can improve fuel utilization, reduce emissions and reduce carbon deposits in response to the above technical problems.

[0005] In a first aspect, the present application provides a control method for a motorcycle twin-cylinder engine, the method comprising:

[0006] When the motorcycle engine is in the starting condition, detect the missing teeth on the motorcycle crankshaft;

[0007] When the missing tooth is detected, determining first left cylinder stroke information corresponding to the left cylinder of the motorcycle engine and first right cylinder stroke information corresponding to the right cylinder of the motorcycle engine based on the missing tooth predicted position of the missing tooth;

[0008] determining whether a current stroke of the engine meets an initial operating condition according to the first left cylinder stroke information and the first right cylinder stroke information;

[0009] If it is determined that the initial operating condition is met, the two-cylinder engine is controlled to perform a single fuel injection and two ignitions in each working cycle.

[0010] In one embodiment, the missing tooth predicted position includes a first missing tooth predicted position and a second missing tooth predicted position; and determining first left cylinder stroke information corresponding to a left cylinder of an engine of a motorcycle and first right cylinder stroke information corresponding to a right cylinder of an engine of the motorcycle based on the missing tooth predicted position includes:

[0011] If the first predicted position of the missing tooth is the compression stroke of the left cylinder of the engine, then determining that the tooth-missing front stroke of the left cylinder of the engine includes the first left cylinder intake stroke;

[0012] If the second predicted position of the missing tooth is the exhaust stroke of the left cylinder of the engine, then determining that the right cylinder of the engine is in the right cylinder expansion stroke, and determining that the tooth-missing front stroke of the right cylinder of the engine is the right cylinder compression stroke;

[0013] acquiring the first left cylinder intake pressure of the first left cylinder intake stroke as first left cylinder stroke information;

[0014] Obtain a first time between preset expansion crankshaft cams corresponding to the right cylinder expansion stroke, and obtain a second time between preset compression crankshaft cams corresponding to the right cylinder compression stroke, and use the first time and the second time as first right cylinder stroke information.

[0015] In one embodiment, the determining, based on the missing tooth predicted position of the missing tooth, first left cylinder stroke information corresponding to the left cylinder of the engine of the motorcycle and first right cylinder stroke information corresponding to the right cylinder of the engine of the motorcycle comprises:

[0016] If the first predicted position of the missing tooth is the compression stroke of the left cylinder of the engine, then determining that the post-tooth-missing stroke of the right cylinder of the engine includes the right cylinder intake stroke;

[0017] If the second predicted position of the missing tooth is the exhaust stroke of the left cylinder of the engine, then determining that the post-tooth missing stroke of the left cylinder of the engine includes the second left cylinder intake stroke;

[0018] The right cylinder intake pressure of the right cylinder intake stroke is obtained as the first right cylinder stroke information; the second left cylinder intake pressure corresponding to the second left cylinder intake stroke is obtained as the first left cylinder stroke information.

[0019] In one embodiment, the controlling the engine to perform a single fuel injection and two ignitions in each working cycle further includes:

[0020] If the first left cylinder stroke information is the first left cylinder intake pressure, and it is determined according to the first left cylinder intake pressure that the current stroke of the engine meets the initial operating condition, then the missing tooth actual position of the missing tooth is determined to be the left cylinder compression stroke of the engine, and the second right cylinder stroke information corresponding to the right cylinder of the engine of the motorcycle is obtained when the missing tooth actual position is the left cylinder compression stroke;

[0021] determining whether a target operating condition is met according to the second right cylinder stroke information;

[0022] If it is determined that the target operating condition is met, the two-cylinder engine is controlled to perform a single fuel injection and a single ignition in each working cycle.

[0023] In one embodiment, the controlling the engine to perform a single fuel injection and two ignitions in each working cycle further includes:

[0024] If the first right cylinder stroke information is the first time and the second time, and it is determined according to the first time and the second time that the current stroke of the engine meets the initial operating condition, then the missing tooth actual position of the missing tooth is determined to be the exhaust stroke of the left cylinder of the engine, and the second left cylinder stroke information corresponding to the left cylinder of the engine of the motorcycle is obtained when the missing tooth actual position is the exhaust stroke of the left cylinder;

[0025] determining, according to the second left cylinder stroke information, whether the current stroke of the engine meets a target operating condition;

[0026] If it is determined that the target operating condition is met, the two-cylinder engine is controlled to perform a single fuel injection and a single ignition in each working cycle.

[0027] In one embodiment, it also includes:

[0028] If it is determined that the target operating condition is not met, the two-cylinder engine is controlled to perform two fuel injections and two ignitions in each working cycle until the current stroke meets the target operating condition.

[0029] In a second aspect, the present application also provides a control device for a motorcycle twin-cylinder engine, the device comprising:

[0030] A detection module, used to detect missing teeth on a motorcycle crankshaft when the motorcycle engine is in a starting condition;

[0031] an information acquisition module, for determining, when the missing tooth is detected, first left cylinder stroke information corresponding to the left cylinder of the engine of the motorcycle and first right cylinder stroke information corresponding to the right cylinder of the engine of the motorcycle based on the missing tooth predicted position of the missing tooth;

[0032] an information processing module, configured to determine whether a current stroke of the engine meets an initial operating condition according to the first left cylinder stroke information and the first right cylinder stroke information;

[0033] The control module is used to control the two-cylinder engine to perform a single fuel injection and two ignitions in each working cycle if it is determined that the initial operating condition is met.

[0034] On the third aspect, the present application also provides a control system for a motorcycle twin-cylinder engine, comprising a controller, an engine left cylinder, an engine right cylinder, an injector and an ignition switch which are respectively communicatively connected to the controller; the injector is connected to the engine left cylinder and the engine right cylinder, and is used to spray fuel to the engine left cylinder and the engine right cylinder according to the control of the controller; the ignition switch is connected to the engine left cylinder and the engine right cylinder, and is used to ignite the engine left cylinder and the engine right cylinder according to the control of the controller; the controller is used to execute the steps of the above-mentioned control method for a motorcycle twin-cylinder engine.

[0035] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of the control method of the above-mentioned motorcycle twin-cylinder engine when executed by a processor.

[0036] In a fifth aspect, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the steps of the control method of the motorcycle twin-cylinder engine are implemented.

[0037] The control method, device, system, storage medium and computer program product of the above-mentioned motorcycle twin-cylinder engine, when the motorcycle engine is in the starting condition, detects the missing teeth on the motorcycle crankshaft; when the missing teeth are detected, based on the missing teeth prediction position of the missing teeth, determine the first left cylinder stroke information corresponding to the left cylinder of the motorcycle engine and the first right cylinder stroke information corresponding to the right cylinder of the motorcycle engine; according to the first left cylinder stroke information and the first right cylinder stroke information, determine whether the current stroke of the engine meets the initial working condition operation condition; if it is determined that the initial working condition operation condition is met, control the twin-cylinder engine to perform a single fuel injection and two ignitions in each working cycle. Thus, the first left cylinder stroke information of the left cylinder of the engine and the first stroke information of the right cylinder of the engine are determined by the missing teeth prediction position of the missing teeth, thereby combining the stroke information of the left cylinder and the right cylinder to judge whether the current stroke of the engine meets the initial working condition operation condition, thereby determining the injection mode and the ignition mode, compared with the method of the traditional injector performing two fuel injections in each working cycle, it can save fuel and improve fuel utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic diagram of an engine working process in one embodiment;

[0039] Figure 2 A schematic diagram of a comparison of the working strokes of a two-cylinder engine in one embodiment;

[0040] Figure 3A schematic diagram of a crankshaft structure of a control method for a motorcycle twin-cylinder engine in one embodiment;

[0041] Figure 4 A schematic flow chart of a control method for a motorcycle twin-cylinder engine in one embodiment;

[0042] Figure 5 A schematic flow chart of a control method for a twin-cylinder motorcycle engine in another embodiment;

[0043] Figure 6 A schematic diagram illustrating a convex tooth and an engine stroke in one embodiment;

[0044] Figure 7 A schematic diagram illustrating a convex tooth and an engine stroke in another embodiment;

[0045] Figure 8 A schematic diagram of fuel injection of a control method for a twin-cylinder motorcycle engine in one embodiment;

[0046] Fig. 9 A schematic flow chart of a control method for a twin-cylinder motorcycle engine in another embodiment;

[0047] Fig.10 is a structural block diagram of a control device for a motorcycle twin-cylinder engine in one embodiment;

[0048] Fig.11 The figure is a structural block diagram of a control system of a motorcycle twin-cylinder engine in one embodiment. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0050] The control method of a motorcycle twin-cylinder engine provided in the embodiment of the present application can be applied to a motorcycle with a twin-cylinder engine, wherein the twin-cylinder engine includes a left engine cylinder and a right engine cylinder, and the left engine cylinder and the right engine cylinder share a crankshaft. The twin-cylinder engine can complete the engine's external work by converting chemical energy into mechanical energy.

[0051] When the motorcycle engine is in the starting state, the engine starts to work, such as Figure 1As shown, the engine completes a working cycle including four strokes: intake stroke, compression stroke, power (expansion) stroke and exhaust stroke. Different strokes have corresponding stroke characteristics. Specifically, intake stroke: the piston moves downward, a vacuum is generated in the cylinder, and the fuel mixture is sucked in; the piston moves upward in the compression stroke, the mixture entering the cylinder is compressed, and the mixture is ignited near the top dead center; the piston moves downward in the expansion stroke, the compressed mixture burns, and the explosion pressure generated by the combustion pushes the piston to do work and outputs it to the outside; the exhaust stroke, the piston moves upward to push the burned gas in the cylinder out of the cylinder. Among them, the crankshaft rotates 180° with the piston in each stroke, and the crankshaft rotates 2 circles to complete a working cycle and output one work to the outside.

[0052] In one embodiment, the crankshaft angle between the left cylinder of the engine and the right cylinder of the engine is 180°. Therefore, when the left cylinder of the engine and the right cylinder of the engine share a crankshaft, Figure 2 As shown, when the engine stroke of the left cylinder of the engine is an exhaust stroke, the engine stroke of the right cylinder of the engine is an expansion stroke, when the engine stroke of the left cylinder of the engine is an intake stroke, the engine stroke of the right cylinder of the engine is an exhaust stroke, when the engine stroke of the left cylinder of the engine is a compression stroke, the engine stroke of the right cylinder of the engine is an intake stroke, and when the engine stroke of the left cylinder of the engine is an expansion stroke, the engine stroke of the right cylinder of the engine is a compression stroke. Therefore, the crankshaft flywheel tooth signal of the exhaust stroke of the left cylinder of the engine and the expansion stroke of the right cylinder of the engine is the same, the crankshaft flywheel tooth signal of the intake stroke of the left cylinder of the engine and the exhaust stroke of the right cylinder of the engine is the same, the crankshaft flywheel tooth signal of the compression stroke of the left cylinder of the engine and the intake stroke of the right cylinder of the engine is the same, and the crankshaft flywheel tooth signal of the expansion stroke of the left cylinder of the engine and the compression stroke of the right cylinder of the engine is the same.

[0053] In one embodiment, if Figure 3 As shown in FIG. 1 , it is a schematic diagram of the arrangement of the crankshaft convex teeth, wherein the convex teeth are arranged at equal intervals on the crankshaft (crankshaft flywheel), and the position of each convex tooth on the crankshaft can be detected by the crankshaft position sensor. If there is no convex tooth at a certain position on the crankshaft, it is a missing tooth (such as Figure 3 There are 2 teeth missing (23 / 24). The protruding teeth and missing teeth on the crankshaft correspond to each stroke of the engine. That is, when the engine is running, the crankshaft will rotate. During the rotation process, each stroke will correspond to a corresponding protruding tooth. Among them, there may be a stroke that corresponds to both a protruding tooth and a missing tooth.

[0054] Among them, when designing the position of the missing tooth on the crankshaft, the missing tooth position may refer to the position relative to each stroke of the left cylinder of the engine, or may refer to the position relative to each stroke of the right cylinder of the engine. For example, if the missing tooth position refers to the position relative to each stroke of the right cylinder of the engine, then the missing tooth position may be set at a position 15° to 165° after the TDC (top dead center) of the right cylinder, that is, the expansion stroke, intake stroke, etc. of the right cylinder stroke of the engine may be the missing tooth position. In the embodiments of the present application, the missing tooth position is taken as an example to illustrate the position relative to each stroke of the left cylinder of the engine. The missing tooth position may be set at the exhaust stroke of the left cylinder of the engine, or at the compression stroke of the left cylinder of the engine, etc.

[0055] In one of the embodiments, when the motorcycle engine is running, it is necessary to inject fuel into the cylinder through the injector and ignite the ignition coil to achieve energy conversion, and the engine's external work process is completed here. Therefore, when the motorcycle engine is in the starting condition, the motorcycle's ECU (electronic injection control unit) detects the missing tooth on the motorcycle crankshaft; when the missing tooth is detected, based on the missing tooth predicted position of the missing tooth, the first left cylinder stroke information corresponding to the left cylinder of the motorcycle engine and the first right cylinder stroke information corresponding to the right cylinder of the motorcycle engine are determined; according to the first left cylinder stroke information and the first right cylinder stroke information, it is determined whether the current stroke of the engine meets the initial operating condition; if it is determined that the initial operating condition is met, the two-cylinder engine is controlled to perform a single fuel injection and two ignitions in each working cycle, thereby effectively improving fuel utilization.

[0056] Among them, the ECU of the motorcycle can adopt a control main board, and the control main board can be provided with devices such as CPU (Central Processing Unit, central processing unit), MCU (Micro Control Unit, micro control unit) and the like.

[0057] In one embodiment, Figure 4 As shown, a control method for a motorcycle twin-cylinder engine is provided, and the method is applied to an electronic fuel injection control unit of a motorcycle as an example for explanation, and includes the following steps:

[0058] Step S402, when the motorcycle engine is in a starting condition, detecting missing teeth on the motorcycle crankshaft.

[0059] The engine may be an engine of a two-wheeled motorcycle, which can ignite the fuel mixture entering the cylinder to convert the heat energy generated by its combustion into mechanical energy, and the crankshaft (crankshaft flywheel) transmits the power to the rear wheel of the motorcycle through a transmission mechanism to convert it into a driving force for the vehicle. The transmission mechanism may include a crankshaft, a connecting rod connected to the crankshaft, and a piston connected to the connecting rod. The crankshaft is a component in the engine, and the crankshaft receives the force transmitted from the connecting rod, converts it into torque, outputs it through the crankshaft, and drives other accessories on the engine to work. Missing teeth refers to a position on the crankshaft flywheel where no convex teeth are set, that is, missing teeth.

[0060] In one embodiment, when the engine is in the starting state, that is, the engine starts to run, the ECU can detect the missing tooth position on the crankshaft of the motorcycle, and combine Figure 3 As shown, each convex tooth is set at an equal distance, and the interval between two adjacent convex teeth can be set to 15 degrees. The ECU will record the time between each two adjacent convex teeth (number 0 to number 1, number 1 to number 2...number 20 to number 21). Among them, the ECU can determine the missing tooth position by comparing the time between each convex tooth. Specifically, if the time between two convex teeth is significantly greater than the time between other adjacent convex teeth, the ECU can determine that there is a missing tooth between the two convex teeth.

[0061] Step S404, when the missing tooth is detected, determining the first left cylinder stroke information corresponding to the left cylinder of the motorcycle engine and the first right cylinder stroke information corresponding to the right cylinder of the motorcycle engine based on the predicted missing tooth position of the missing tooth.

[0062] Among them, the predicted missing tooth position refers to the working stroke in the engine working cycle where the missing tooth is predicted to be located, wherein the actual position of the missing tooth is determined when designing the crankshaft, wherein the missing tooth can be designed in any one of the intake stroke, compression stroke, expansion stroke and exhaust stroke. In an embodiment of the present application, the predicted missing tooth position can be the left cylinder exhaust stroke of the left cylinder of the engine, or it can be the left cylinder compression stroke of the left cylinder of the engine.

[0063] Among them, the first left cylinder stroke information refers to information related to the stroke of the left cylinder engine, and the first right cylinder stroke information refers to information related to the stroke of the right cylinder engine. The first left cylinder stroke information and the first right cylinder stroke information are related to the predicted tooth missing position. Therefore, when the ECU determines the predicted tooth missing position, it can correspondingly determine the first left cylinder stroke information of the left cylinder of the engine and the first right cylinder stroke information of the right cylinder of the engine. For example, if the predicted tooth missing position is the exhaust stroke of the left cylinder engine, the first left cylinder stroke information may refer to the intake pressure of the working stroke after the missing tooth. If the predicted tooth missing position is the compression stroke of the left cylinder engine, the first right cylinder stroke may be the intake pressure of the working stroke after the missing tooth.

[0064] Step S406: Determine whether the current stroke of the engine meets the initial operating condition based on the first left cylinder stroke information and the first right cylinder stroke information.

[0065] Among them, the current stroke of the engine refers to the stroke of the engine after it is in the starting condition, and the initial operating condition refers to the condition set for predicting the current stroke. Among them, the initial operating condition can refer to whether the current stroke of the engine is in the exhaust stroke of the left cylinder, or it can refer to whether the current stroke of the engine is in the compression stroke of the left cylinder. The specific initial operating condition can be adaptively adjusted according to the working stroke where the actual missing tooth is located.

[0066] In one of the embodiments, after obtaining the first left cylinder stroke information and the first right cylinder stroke information, the ECU can determine whether the current stroke of the engine meets the initial operating condition according to the first left cylinder stroke information and the first right cylinder stroke information.

[0067] Step S408: If it is determined that the initial operating condition is met, the two-cylinder engine is controlled to perform a single fuel injection and two ignitions in each working cycle.

[0068] Among them, single fuel injection means that only one fuel injection is performed in one working cycle of a two-cylinder engine, and double ignition means that two ignitions are performed in one working cycle of the engine. Therefore, when the ECU determines that the initial operating conditions are met, the two-cylinder engine is controlled to perform a single fuel injection and two ignitions in each working cycle, which can solve the problem of fuel waste.

[0069] In the control method of the above-mentioned motorcycle twin-cylinder engine, when the motorcycle engine is in the starting condition, the missing teeth on the motorcycle crankshaft are detected; when the missing teeth are detected, the first left cylinder stroke information corresponding to the left cylinder of the motorcycle engine and the first right cylinder stroke information corresponding to the right cylinder of the motorcycle engine are determined based on the missing tooth prediction position of the missing teeth; according to the first left cylinder stroke information and the first right cylinder stroke information, it is determined whether the current stroke of the engine meets the initial working condition operation condition; if it is determined that the initial working condition operation condition is met, the twin-cylinder engine is controlled to perform a single fuel injection and two ignitions in each working cycle. Thus, the first left cylinder stroke information of the left cylinder of the engine and the first stroke information of the right cylinder of the engine are determined by the missing tooth prediction position of the missing teeth, thereby combining the stroke information of the left cylinder and the right cylinder to judge whether the current stroke of the engine meets the initial working condition operation condition, so as to determine the injection mode and the ignition mode, which can save fuel and improve fuel utilization compared with the current method in which the injector performs two fuel injections in each working cycle.

[0070] In one embodiment, Figure 5 As shown, the missing tooth prediction position includes a first missing tooth prediction position and a second missing tooth prediction position; the first left cylinder stroke information corresponding to the left cylinder of the motorcycle engine and the first right cylinder stroke information corresponding to the right cylinder of the motorcycle engine based on the missing tooth prediction position include the following steps:

[0071] Step S502: If the first predicted position of the missing tooth is the compression stroke of the left cylinder of the engine, it is determined that the stroke before the missing tooth of the left cylinder of the engine includes the first left cylinder intake stroke.

[0072] Among them, if the first predicted position of the missing tooth is the compression stroke of the left cylinder of the engine, then when the ECU detects the missing tooth, it can combine the stroke characteristics of the corresponding left cylinder and right cylinder of the engine when the missing tooth is set in the left cylinder stroke of the engine, and determine that the stroke before the missing tooth of the left cylinder of the engine includes the first left cylinder intake stroke, and the ECU can look up the left cylinder intake pressure corresponding to the first left cylinder intake stroke (the first left cylinder intake stroke is the intake stroke, and the intake pressure is normally negative pressure).

[0073] Step S504, if the second predicted position of the missing tooth is the exhaust stroke of the left cylinder of the engine, it is determined that the right cylinder of the engine is in the right cylinder expansion stroke, and it is determined that the stroke before the missing tooth of the right cylinder of the engine is the right cylinder compression stroke.

[0074] Among them, if the second predicted position of the missing tooth is the exhaust stroke of the left cylinder of the engine, the ECU, based on the characteristics of the left cylinder exhaust stroke, determines that when the missing tooth is detected, the right cylinder of the engine is in the right cylinder expansion stroke, and the stroke before the missing tooth of the right cylinder is the right cylinder compression stroke (the right cylinder compression stroke has a slower angular velocity and a longer tooth spacing time, which is significantly different from other strokes).

[0075] Step S506, obtaining the first left cylinder intake pressure of the first left cylinder intake stroke as the first left cylinder stroke information; obtaining the first time between the preset expansion crankshaft cams corresponding to the right cylinder expansion stroke, and obtaining the second time between the preset compression crankshaft cams corresponding to the right cylinder compression stroke, and using the first time and the second time as the first right cylinder stroke information.

[0076] Among them, the first left cylinder intake stroke is the tooth-missing front stroke of the left cylinder engine. Therefore, the ECU can obtain the first left cylinder intake pressure of the first left cylinder intake stroke as the first left cylinder stroke information. The first time between the preset expansion crankshaft cam teeth refers to the time required for the crankshaft to rotate through two consecutive cam teeth for the right cylinder expansion stroke (such as the time required from cam No. 2 to cam No. 3). The first time may also refer to the time required for the crankshaft to rotate through two discontinuous cam teeth (such as from cam No. 2 to cam No. 4) in the right cylinder expansion stroke. The second time refers to the time required for the crankshaft to rotate through two consecutive cam teeth for the right cylinder compression stroke (such as the time required from cam No. 18 to cam No. 19). The second time may also refer to the time required for the crankshaft to rotate through two discontinuous cam teeth (such as from cam No. 18 to cam No. 20) in the right cylinder compression stroke. Among them, when determining the first time and the second time, the selection of the specific cam teeth can be adaptively adjusted according to actual conditions.

[0077] In the above embodiment, the corresponding first left cylinder intake pressure is determined as the first left cylinder stroke information for the left cylinder compression stroke of the left cylinder of the engine, and the corresponding first time and second time are determined as the first right cylinder stroke information for the left cylinder exhaust stroke of the left cylinder of the engine. Since the stroke characteristics of the left cylinder and the right cylinder are combined at the same time, the current stroke of the engine is judged from the perspective of time and pressure, which improves the accuracy of the stroke judgment to a certain extent.

[0078] Among them, in the above embodiments, it is explained how to determine the first left cylinder stroke information when the first predicted position of the missing tooth is the left cylinder compression stroke of the left cylinder engine, and how to determine the first right cylinder stroke information when the second predicted position of the missing tooth is the left cylinder exhaust stroke of the engine.

[0079] In one embodiment, the missing tooth predicted position includes a first missing tooth predicted position and a second missing tooth predicted position; the determining of first left cylinder stroke information corresponding to a left cylinder of the motorcycle engine and first right cylinder stroke information corresponding to a right cylinder of the motorcycle engine based on the missing tooth predicted position also includes:

[0080] If the first predicted position of the missing tooth is the compression stroke of the left cylinder of the engine, then determining that the post-tooth-missing stroke of the right cylinder of the engine includes the right cylinder intake stroke;

[0081] If the second predicted position of the missing tooth is the exhaust stroke of the left cylinder of the engine, then determining that the post-tooth missing stroke of the left cylinder of the engine includes the second left cylinder intake stroke;

[0082] The right cylinder intake pressure of the right cylinder intake stroke is obtained as the first right cylinder stroke information; the second left cylinder intake pressure corresponding to the second left cylinder intake stroke is obtained as the first left cylinder stroke information.

[0083] In this embodiment, when the first predicted position of the missing tooth is the compression stroke of the left cylinder of the engine, the first right cylinder stroke information is determined, and when the second predicted position of the missing tooth is the exhaust stroke of the left cylinder of the engine, the first left cylinder stroke information is determined.

[0084] Among them, if the first predicted position of the missing tooth is the compression stroke of the left cylinder of the engine, then when the ECU detects the missing tooth, it can combine the stroke characteristics of the corresponding left cylinder and right cylinder of the engine when the missing tooth is set in the left cylinder stroke of the engine, and determine that the stroke after the missing tooth of the right cylinder of the engine includes the right cylinder intake stroke, and determine that the stroke after the missing tooth of the left cylinder of the engine includes the second left cylinder intake stroke.

[0085] When it is determined that the stroke after the missing tooth of the right cylinder of the engine includes the right cylinder intake stroke, and the stroke after the missing tooth of the left cylinder of the engine includes the second left cylinder intake stroke, the right cylinder intake pressure of the right cylinder intake stroke can be obtained as the first right cylinder stroke information; the second left cylinder intake pressure corresponding to the second left cylinder intake stroke can be obtained as the first left cylinder stroke information.

[0086] In the above embodiment, the ECU determines the corresponding right cylinder intake pressure as the first right cylinder stroke information for the left cylinder compression stroke of the left cylinder of the engine, and determines the corresponding second left cylinder intake pressure as the first left cylinder stroke information for the left cylinder exhaust stroke of the left cylinder of the engine. Since the stroke characteristics of the left cylinder and the right cylinder are combined at the same time (the tooth-missing stroke after the left cylinder of the engine and the tooth-missing stroke after the right cylinder of the engine are selected), the current stroke of the engine is judged from the perspective of pressure, which improves the accuracy of subsequent stroke judgment to a certain extent.

[0087] In one of the embodiments, after controlling the engine to perform a single fuel injection and two ignitions in each working cycle, the further method further includes: if the first left cylinder stroke information is the first left cylinder intake pressure, and it is determined based on the first left cylinder intake pressure that the current stroke of the engine meets the initial operating condition, then determining the missing tooth actual position of the missing tooth to be the left cylinder compression stroke of the engine, and obtaining the second right cylinder stroke information corresponding to the right cylinder of the motorcycle engine when the missing tooth actual position is the left cylinder compression stroke; determining whether the target operating condition is met based on the second right cylinder stroke information; if it is determined that the target operating condition is met, controlling the two-cylinder engine to perform a single fuel injection and a single ignition in each working cycle.

[0088] Among them, the second right cylinder stroke information is the right cylinder stroke information relative to the first left cylinder stroke information, and the target operating condition refers to the condition set for final judgment of the current stroke. After the initial judgment of the stroke, the accuracy of the stroke judgment can be improved by setting the target operating condition. Among them, the target operating condition can refer to whether the current stroke of the engine is in the exhaust stroke of the left cylinder, or it can refer to whether the current stroke of the engine is in the compression stroke of the left cylinder. The specific target operating condition can be adaptively adjusted according to the actual working stroke of the missing tooth.

[0089] In one embodiment, if the first left cylinder stroke information is the first left cylinder intake pressure, it means that the current judgment is carried out when the missing tooth position is set in the left cylinder compression stroke. If the ECU determines that the current stroke of the engine meets the initial working condition based on the first left cylinder intake pressure, the ECU determines that the missing tooth actual position of the missing tooth is the left cylinder compression stroke of the engine. When the missing tooth actual position is the left cylinder compression stroke, the ECU can obtain the second right cylinder stroke information corresponding to the right cylinder of the motorcycle engine. After obtaining the second right cylinder stroke information, it can be determined whether the target working condition is met based on the second right cylinder stroke information; if it is determined that the target working condition is met, the two-cylinder engine is controlled to perform a single fuel injection and a single ignition in each working cycle. In this way, further stroke judgment can be performed to improve the reliability of stroke judgment.

[0090] In one of the embodiments, when the first left cylinder stroke information includes the first left cylinder intake pressure, the ECU can determine whether the first left cylinder intake pressure is a negative pressure (for example, if the first left cylinder intake pressure is lower than the ambient atmospheric pressure by more than 10 kpa (settable) , It can be determined to be a negative pressure). If it is a negative pressure, the ECU determines that the initial operating conditions are met, and it can be determined that the missing tooth position is set in the left cylinder compression stroke of the engine.

[0091] In the above embodiment, by combining the characteristics of the engine's intake stroke in which the piston moves downward and the intake pressure is negative, it is determined whether the intake pressure of the first left cylinder is negative, thereby determining whether the initial operating conditions are met. By making the judgment from the perspective of pressure, the accuracy of the judgment is improved.

[0092] In one embodiment, the controlling the engine to perform a single fuel injection and two ignitions in each working cycle further includes:

[0093] If the first right cylinder stroke information is the first time and the second time, and it is determined based on the first time and the second time that the current stroke of the engine meets the initial operating condition, then the actual position of the missing tooth is determined to be the exhaust stroke of the left cylinder of the engine, and the second left cylinder stroke information corresponding to the left cylinder of the engine of the motorcycle is obtained when the actual position of the missing tooth is the exhaust stroke of the left cylinder; based on the second left cylinder stroke information, it is determined whether the current stroke of the engine meets the target operating condition; if it is determined that the target operating condition is met, the two-cylinder engine is controlled to perform a single fuel injection and a single ignition in each working cycle.

[0094] Among them, the second left cylinder stroke information is the left cylinder stroke information relative to the first right cylinder stroke information. If the first right cylinder stroke information is the first time and the second time, it means that the current judgment is carried out when the missing tooth position is set in the left cylinder exhaust stroke. If the ECU determines that the current stroke of the engine meets the initial working condition based on the first time and the second time, the ECU determines that the missing tooth actual position of the missing tooth is the engine's left cylinder exhaust stroke. When the missing tooth actual position is the left cylinder exhaust stroke, the ECU can obtain the second left cylinder stroke information corresponding to the motorcycle's engine right cylinder. After obtaining the second left cylinder stroke information, it can be determined whether the target working condition is met based on the second left cylinder stroke information; if it is determined that the target working condition is met, the two-cylinder engine is controlled to perform a single fuel injection and a single ignition in each working cycle.

[0095] In the above embodiment, only when the stroke information of the second left cylinder meets the target operating conditions, the ECU will control the two-cylinder engine to perform a single fuel injection and a single ignition in each working cycle. On the one hand, after the initial operating conditions are met, a single fuel injection and two ignitions in each working cycle can save fuel and ensure that there will be ignition in the compression stroke of the engine. On the other hand, by determining whether the current stroke meets the target operating conditions, the accuracy of the judgment result of the initial operating conditions can be further verified. When it is verified that the target operating conditions are met, the ECU changes the two ignitions to a single ignition, which ensures that the ignition process must be in the compression stroke of the engine, thereby improving the reliability of the engine during operation.

[0096] In one embodiment, the first right cylinder stroke information includes a first time and a second time; if the ratio of the first time and the second time meets the preset time ratio condition, the ECU determines that the initial operating condition is met. Specifically, the first time may refer to the time required for the crankshaft to rotate over the (18-20) cam teeth in the right cylinder expansion stroke, and the second time may refer to the time required for the crankshaft to rotate over the (2-3) cam teeth in the right cylinder compression stroke. The preset time ratio condition refers to the ratio condition set according to the characteristics of the right cylinder expansion stroke and the right cylinder compression stroke (the angular velocity of the right cylinder compression stroke is slower, the tooth spacing time is longer, and the tooth spacing time of the right cylinder expansion stroke is shorter). For example, the preset time ratio condition may be whether the ratio of the first time to the second time is greater than 2.5. When the first time is 18.8 and the second time is 3.4, the ratio of the two is 5.53, which is greater than 2.5, indicating that the initial operating condition is met. In the above embodiment, whether the current stroke meets the initial operating condition is determined based on the time characteristics of each stroke when the engine is in the starting condition, thereby accurately determining whether the current stroke of the engine is suitable for a single fuel injection.

[0097] In one embodiment, the first left cylinder stroke information includes the second left cylinder intake pressure; it means that the current judgment is carried out when the missing tooth position is set in the left cylinder exhaust stroke. If the ECU determines that the current stroke of the engine meets the initial working condition according to the second left cylinder intake pressure, the ECU determines that the missing tooth actual position of the missing tooth is the left cylinder exhaust stroke of the engine. In the above embodiment, by combining the characteristics of the engine's intake stroke piston going down and the intake pressure being negative pressure, it is judged whether the second left cylinder intake pressure is negative pressure, thereby judging whether the initial working condition is met, and by judging from the perspective of pressure, it is accurately judged whether the current stroke of the engine is suitable for single fuel injection.

[0098] In one embodiment, the first right cylinder stroke information includes the right cylinder intake pressure, which indicates that the current judgment is carried out when the missing tooth position is set in the left cylinder compression stroke. If the ECU determines that the current stroke of the engine meets the initial working condition based on the right cylinder intake pressure, the ECU determines that the missing tooth actual position of the missing tooth is the left cylinder compression stroke of the engine. In the above embodiment, by combining the characteristics of the engine's suction stroke piston going down and the intake pressure being negative pressure, it is judged whether the right cylinder intake pressure is negative pressure, thereby judging whether the initial working condition is met, and by judging from the perspective of pressure, it is accurately judged whether the current stroke of the engine is suitable for single fuel injection.

[0099] In one of the embodiments, it also includes: if it is determined that the target operating condition is not met, controlling the two-cylinder engine to perform two fuel injections and two ignitions in each working cycle until the current stroke meets the target operating condition.

[0100] Among them, when the ECU determines that the current stroke of the engine does not meet the target operating conditions, it will control the two-cylinder engine to perform two fuel injections and two ignitions in each working cycle, and at the same time continue to judge whether the current stroke meets the target operating conditions until the current stroke meets the target operating conditions. The judgment process ends, so even if the current working stroke of the motorcycle does not meet the single fuel injection and single ignition, the working stroke of the engine can be continuously judged until the current stroke of the motorcycle meets the target operating conditions, thereby reducing the fuel injection amount to a certain extent, improving the fuel utilization rate of the motorcycle engine, and achieving energy saving and consumption reduction.

[0101] In one embodiment, if Figure 6 As shown, it is a schematic diagram of the stroke of a two-cylinder engine when the actual position of the missing tooth is set in the exhaust stroke of the left cylinder:

[0102] Among them, when the missing tooth position is set in the exhaust stroke of the left cylinder, for the right cylinder stroke, the ECU can find the tooth spacing time of the expansion stroke before the missing tooth, and the tooth spacing time of the compression stroke, and compare the tooth spacing time of the compression stroke and the tooth spacing time of the expansion stroke to see if it is greater than the set time threshold (for the right cylinder stroke, the right cylinder is the compression stroke before the missing tooth, the angular velocity is slower, and the tooth spacing time is longer). Figure 6 As shown: T(18~20) / T(2~3)=18.8 / 3.4=5.53 can be used, and the ECU compares 5.53 with the threshold value 2.5 (settable) to complete the travel judgment.

[0103] Among them, when the missing tooth position is set in the left cylinder exhaust stroke, for the left cylinder stroke, the first left cylinder intake stroke is after the missing tooth, then the ECU can look for the first left cylinder intake pressure of the first left cylinder intake stroke (when the left cylinder is in the intake stroke, the intake pressure is negative pressure, and when the first left cylinder intake pressure is more than 10kpa lower than the ambient atmospheric pressure (settable) , the condition is met), thereby completing the stroke judgment through the first left cylinder intake pressure.

[0104] In one embodiment, if Figure 7As shown, it is a stroke diagram of a two-cylinder engine when the actual position of the missing tooth is set in the compression stroke of the left cylinder: wherein, when the missing tooth position is set in the compression stroke of the left cylinder, for the right cylinder stroke, the right cylinder intake stroke is after the missing tooth, then the ECU can look up the right cylinder intake pressure corresponding to the right cylinder intake stroke after the missing tooth, and compare whether the right cylinder intake pressure is negative pressure (when the right cylinder is in the intake stroke, the intake pressure is negative pressure, and when the right cylinder intake pressure is lower than the ambient atmospheric pressure by more than 10kpa (settable), the condition is met), thereby completing the stroke judgment.

[0105] Among them, when the missing tooth position is set in the compression stroke of the left cylinder, for the left cylinder stroke, the left cylinder intake stroke is before the missing tooth, then the ECU can look up the left cylinder intake pressure of the left cylinder intake stroke (when the left cylinder is in the intake stroke, the intake pressure is negative pressure, when the left cylinder intake pressure is more than 10kpa lower than the ambient atmospheric pressure (settable) , the condition is met), thereby completing the stroke judgment through the intake pressure.

[0106] In one embodiment, if Figure 8 As shown, this is a schematic diagram of fuel injection in one working cycle of the engine:

[0107] Among them, the missing tooth in the figure is determined to be at the convex tooth No. 2 (this position is the expansion stroke of the right cylinder engine and the exhaust stroke of the left cylinder engine, which is given by the engine crankshaft flywheel hardware). When the missing tooth is determined, the ECU can count down from the convex tooth No. 2 in sequence, and call the first time from the convex tooth No. 18 to the convex tooth No. 20, and the second time from the convex tooth No. 2 to the convex tooth No. 3. If the ratio of the first time to the second time is greater than the threshold, the ECU determines that the initial working condition stroke prediction is successful, and the initial fuel injection of the starting condition is performed once every 720° of the left cylinder. Further, the ECU determines the left cylinder intake pressure of the left cylinder stroke after the missing tooth. If the stroke is further determined to be successful based on the left cylinder intake pressure, the right cylinder is controlled to perform fuel injection once every 720°. If it is unsuccessful, the left cylinder engine and the right cylinder engine will inject fuel once every 360° after the missing tooth, thereby improving the fuel utilization rate of the motorcycle engine in the cold start condition, and at the same time, it can achieve energy saving and consumption reduction and reduce harmful gas emissions.

[0108] In one embodiment, if Fig. 9 FIG. 1 is a flow chart of a control method for a motorcycle twin-cylinder engine in a specific embodiment:

[0109] Among them, when the engine of the motorcycle is in the starting condition, the missing tooth can be determined. Specifically, since the missing tooth of the motorcycle is fixed when the crankshaft is designed, the missing tooth can be designed in any one of the intake stroke, compression stroke, expansion stroke and exhaust stroke. In this embodiment, the missing tooth setting position can be the left cylinder exhaust stroke of the left cylinder of the engine, or it can be the left cylinder compression stroke of the left cylinder of the engine.

[0110] Among them, since when the missing tooth is detected, it can only be determined that the missing tooth may be set in the exhaust stroke of the left cylinder, or may be set in the compression stroke of the left cylinder. Therefore, for the possible positions where the missing tooth may be set, corresponding stroke information needs to be obtained. In this embodiment, for the missing tooth set in the exhaust stroke of the left cylinder, it can be determined that the right cylinder of the engine is in the right cylinder expansion stroke, and the stroke before the missing tooth of the right cylinder of the engine is the right cylinder compression stroke (the right cylinder compression stroke, the angular velocity is slower, the tooth spacing time is longer, and it is obviously different from other strokes). Then, the first time between the preset expansion crankshaft cam teeth corresponding to the right cylinder expansion stroke and the second time between the preset compression crankshaft cam teeth corresponding to the right cylinder compression stroke can be obtained.

[0111] For the missing tooth setting in the compression stroke of the left cylinder, it can be determined that the stroke before the missing tooth of the left cylinder of the engine is the first left cylinder intake stroke, and the first left cylinder intake pressure corresponding to the first left cylinder intake stroke can be obtained.

[0112] Therefore, the current stroke is judged by the first time, the second time and the first left cylinder intake pressure. If the ECU determines that the current stroke of the engine meets the initial operating conditions according to the first left cylinder intake pressure, if it meets the conditions, the two-cylinder engine is controlled to perform a single fuel injection and two ignitions in each working cycle. At the same time, the ECU can determine that the actual position of the missing tooth is the compression stroke of the left cylinder of the engine. When the actual position of the missing tooth is the compression stroke of the left cylinder, the ECU can determine that the stroke after the missing tooth of the right cylinder of the motorcycle engine is the intake stroke of the right cylinder, and the right cylinder intake pressure corresponding to the right cylinder intake stroke can be obtained. According to the right cylinder intake pressure, it is determined whether to control the two-cylinder engine to perform a single fuel injection and a single ignition in each working cycle.

[0113] When the intake pressure of the right cylinder is negative pressure, the two-cylinder engine can be controlled to perform a single fuel injection and a single ignition in each working cycle. Otherwise, a conventional PM (pressure) judgment is performed in the working cycle of the engine. If it is still not satisfied, the two-cylinder engine is controlled to perform two fuel injections and two ignitions in each working cycle, and the PM judgment is repeated until the conventional PM (pressure) judgment is successful. The two-cylinder engine is controlled to perform a single fuel injection (360° fuel injection) and a single ignition (360° ignition) in each working cycle.

[0114] Among them, if the ECU determines that the current stroke of the engine meets the initial operating conditions based on the first time and the second time, if it does, the two-cylinder engine is controlled to perform a single fuel injection and two ignitions in each working cycle. At the same time, the ECU can determine that the actual position of the missing tooth is the exhaust stroke of the left cylinder of the engine. When the actual position of the missing tooth is the exhaust stroke of the left cylinder, the ECU can determine that the stroke after the missing tooth of the left cylinder of the motorcycle engine is the intake stroke of the second left cylinder, and the intake pressure of the second left cylinder corresponding to the intake stroke of the second left cylinder can be obtained. According to the intake pressure of the second left cylinder, it is determined whether to control the two-cylinder engine to perform a single fuel injection and a single ignition in each working cycle.

[0115] When the intake pressure of the second left cylinder is negative pressure, the two-cylinder engine can be controlled to perform a single fuel injection and a single ignition in each working cycle. Otherwise, a conventional PM (pressure) judgment is performed in the working cycle of the engine. If it is still not satisfied, the two-cylinder engine is controlled to perform two fuel injections and two ignitions in each working cycle, and the PM judgment is repeated until the conventional PM (pressure) judgment is successful, and the two-cylinder engine is controlled to perform a single fuel injection and a single ignition in each working cycle.

[0116] Among them, if the ECU determines that the current stroke of the engine does not meet the initial operating conditions based on the intake pressure of the first left cylinder, and determines that the current stroke of the engine does not meet the initial operating conditions based on the first time and the second time, then the two-cylinder engine is controlled to perform two fuel injections and two ignitions in each working cycle (720° fuel injection, 720° ignition).

[0117] Among them, when the missing tooth position on the motorcycle crankshaft is detected, combined with Figure 3 As shown, each convex tooth is set at an equal distance, and the interval between two adjacent convex teeth can be set to 15 degrees. The ECU will record the time between each two adjacent convex teeth (number 0 to number 1, number 1 to number 2...number 20 to number 21). Among them, by comparing the time between each convex tooth, the missing tooth position can be determined. Specifically, if the time between two convex teeth is significantly greater than the time between other adjacent convex teeth, it is determined that there is a missing tooth between the two convex teeth.

[0118] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0119] Based on the same inventive concept, the embodiment of the present application also provides a control device for a motorcycle twin-cylinder engine for implementing the control method for a motorcycle twin-cylinder engine involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in the embodiments of one or more control devices for motorcycle twin-cylinder engines provided below can refer to the limitations of the control method for motorcycle twin-cylinder engines above, and will not be repeated here.

[0120] In one embodiment, Fig.10 As shown, a control device for a motorcycle twin-cylinder engine is provided, comprising: a detection module 1002, an information acquisition module 1004, an information processing module 1006 and a control module 1008, wherein:

[0121] The detection module 1002 is used to detect missing teeth on the crankshaft of the motorcycle when the motorcycle engine is in the starting condition.

[0122] The information acquisition module 1004 is used to determine the first left cylinder stroke information corresponding to the left cylinder of the motorcycle engine and the first right cylinder stroke information corresponding to the right cylinder of the motorcycle engine based on the predicted missing tooth position of the missing tooth when the missing tooth is detected.

[0123] The information processing module 1006 is used to determine whether the current stroke of the engine meets the initial operating condition according to the first left cylinder stroke information and the first right cylinder stroke information.

[0124] The control module 1008 is used to control the two-cylinder engine to perform a single fuel injection and two ignitions in each working cycle if it is determined that the initial operating condition is met.

[0125] In one embodiment, the information acquisition module is used to determine that the stroke before the tooth missing of the left cylinder of the engine includes the first left cylinder intake stroke if the first predicted position of the missing tooth is the left cylinder compression stroke of the engine; determine that the right cylinder of the engine is in the right cylinder expansion stroke if the second predicted position of the missing tooth is the left cylinder exhaust stroke of the engine, and determine that the stroke before the tooth missing of the right cylinder of the engine is the right cylinder compression stroke; obtain the first left cylinder intake pressure of the first left cylinder intake stroke as the first left cylinder stroke information; obtain the first time between the preset expansion crankshaft cam teeth corresponding to the right cylinder expansion stroke, and obtain the second time between the preset compression crankshaft cam teeth corresponding to the right cylinder compression stroke, and use the first time and the second time as the first right cylinder stroke information.

[0126] In one embodiment, the information acquisition module is used to determine that the stroke after the missing tooth of the right cylinder of the engine includes the right cylinder intake stroke if the first predicted position of the missing tooth is the compression stroke of the left cylinder of the engine; and to determine that the stroke after the missing tooth of the left cylinder of the engine includes the second left cylinder intake stroke if the second predicted position of the missing tooth is the exhaust stroke of the left cylinder of the engine; to obtain the right cylinder intake pressure of the right cylinder intake stroke as the first right cylinder stroke information; and to obtain the second left cylinder intake pressure corresponding to the second left cylinder intake stroke as the first left cylinder stroke information.

[0127] In one embodiment, the control module is also used for, if the first left cylinder stroke information is the first left cylinder intake pressure, determining that the current stroke of the engine meets the initial operating condition based on the first left cylinder intake pressure, then determining the actual position of the missing tooth to be the left cylinder compression stroke of the engine, and obtaining the second right cylinder stroke information corresponding to the right cylinder of the motorcycle engine when the actual position of the missing tooth is the left cylinder compression stroke; determining whether the target operating condition is met based on the second right cylinder stroke information; if it is determined that the target operating condition is met, controlling the two-cylinder engine to perform a single fuel injection and a single ignition in each working cycle.

[0128] In one embodiment, the control module is also used for, if the first right cylinder stroke information is a first time and a second time, determining that the current stroke of the engine meets the initial operating condition based on the first time and the second time, then determining that the actual position of the missing tooth is the exhaust stroke of the left cylinder of the engine, and obtaining the second left cylinder stroke information corresponding to the left cylinder of the engine of the motorcycle when the actual position of the missing tooth is the exhaust stroke of the left cylinder; determining whether the current stroke of the engine meets the target operating condition based on the second left cylinder stroke information; if it is determined that the target operating condition is met, controlling the two-cylinder engine to perform a single fuel injection and a single ignition in each working cycle.

[0129] In one of the embodiments, the control module is further used to control the two-cylinder engine to perform two fuel injections and two ignitions in each working cycle if it is determined that the target operating condition is not met, until the current stroke meets the target operating condition.

[0130] Each module in the control device of the above-mentioned motorcycle twin-cylinder engine can be fully or partially implemented by software, hardware and their combination. The above-mentioned modules can be embedded in or independent of the processor in the control system of the motorcycle twin-cylinder engine in the form of hardware, or can be stored in the memory in the control system of the motorcycle twin-cylinder engine in the form of software, so that the processor can call and execute the corresponding operations of the above-mentioned modules.

[0131] In one embodiment, Fig.11 As shown, a control system for a motorcycle twin-cylinder engine is provided, including a controller 1102, a twin-cylinder engine 1108, an ignition switch 1104 and an injector 1106 which are respectively communicatively connected to the controller 1102, wherein the twin-cylinder engine 1108 includes an engine left cylinder 1110 and an engine right cylinder 1112, the injector 1106 is connected to the engine left cylinder 1110 and the engine right cylinder 1112, and is used for injecting fuel into the engine left cylinder 1110 and the engine right cylinder 1112 according to the control of the controller 1102, and the ignition switch 1104 is connected to the engine left cylinder 1110 and the engine right cylinder 1112, and is used for igniting the engine left cylinder 1110 and the engine right cylinder 1112 according to the control of the controller 1102.

[0132] The controller 1102 may be an ECU (electronic fuel injection control unit), which may be used to execute any of the above steps of the control method for a two-cylinder motorcycle engine.

[0133] Those skilled in the art will understand that Fig.11 The structure shown in the figure is only a block diagram of a part of the structure related to the scheme of the present application, and does not constitute a limitation on the control system of the motorcycle twin-cylinder engine to which the scheme of the present application is applied. The specific control system of the motorcycle twin-cylinder engine may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0134] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the control method of the above-mentioned motorcycle twin-cylinder engine are implemented.

[0135] In one embodiment, a computer program product is provided, comprising a computer program, which implements the steps of the control method of the above-mentioned motorcycle twin-cylinder engine when executed by a processor.

[0136] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0137] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0138] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0139] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A control method for a motorcycle twin-cylinder engine, characterized in that: The method comprises: When the motorcycle engine is in the starting condition, detect the missing teeth on the motorcycle crankshaft; When the missing tooth is detected, determining first left cylinder stroke information corresponding to the left cylinder of the motorcycle engine and first right cylinder stroke information corresponding to the right cylinder of the motorcycle engine based on the missing tooth predicted position of the missing tooth; determining whether a current stroke of the engine meets an initial operating condition according to the first left cylinder stroke information and the first right cylinder stroke information; If it is determined that the initial operating condition is met, the two-cylinder engine is controlled to perform a single fuel injection and two ignitions in each working cycle.

2. The method according to claim 1, characterized in that The missing tooth prediction position includes a first missing tooth prediction position and a second missing tooth prediction position; the determining of first left cylinder stroke information corresponding to a left cylinder of an engine of a motorcycle and first right cylinder stroke information corresponding to a right cylinder of an engine of the motorcycle based on the missing tooth prediction position includes: If the first predicted position of the missing tooth is the compression stroke of the left cylinder of the engine, then determining that the tooth-missing front stroke of the left cylinder of the engine includes the first left cylinder intake stroke; If the second predicted position of the missing tooth is the exhaust stroke of the left cylinder of the engine, then determining that the right cylinder of the engine is in the right cylinder expansion stroke, and determining that the tooth-missing front stroke of the right cylinder of the engine is the right cylinder compression stroke; acquiring the first left cylinder intake pressure of the first left cylinder intake stroke as first left cylinder stroke information; Obtain a first time between preset expansion crankshaft cams corresponding to the right cylinder expansion stroke, and obtain a second time between preset compression crankshaft cams corresponding to the right cylinder compression stroke, and use the first time and the second time as first right cylinder stroke information.

3. The method according to claim 1, characterized in that The missing tooth prediction position includes a first missing tooth prediction position and a second missing tooth prediction position; the first left cylinder stroke information corresponding to the left cylinder of the motorcycle engine and the first right cylinder stroke information corresponding to the right cylinder of the motorcycle engine are determined based on the missing tooth prediction position, and further includes: If the first predicted position of the missing tooth is the compression stroke of the left cylinder of the engine, then determining that the post-tooth-missing stroke of the right cylinder of the engine includes the right cylinder intake stroke; If the second predicted position of the missing tooth is the exhaust stroke of the left cylinder of the engine, then determining that the post-tooth missing stroke of the left cylinder of the engine includes the second left cylinder intake stroke; The right cylinder intake pressure of the right cylinder intake stroke is obtained as the first right cylinder stroke information; the second left cylinder intake pressure corresponding to the second left cylinder intake stroke is obtained as the first left cylinder stroke information.

4. The method according to claim 2, characterized in that: After the engine is controlled to perform a single fuel injection and two ignitions in each working cycle, the method further includes: If the first left cylinder stroke information is the first left cylinder intake pressure, and it is determined according to the first left cylinder intake pressure that the current stroke of the engine meets the initial operating condition, then the missing tooth actual position of the missing tooth is determined to be the left cylinder compression stroke of the engine, and the second right cylinder stroke information corresponding to the right cylinder of the engine of the motorcycle is obtained when the missing tooth actual position is the left cylinder compression stroke; determining whether a target operating condition is met according to the second right cylinder stroke information; If it is determined that the target operating condition is met, the two-cylinder engine is controlled to perform a single fuel injection and a single ignition in each working cycle.

5. The method according to claim 2, characterized in that: After the engine is controlled to perform a single fuel injection and two ignitions in each working cycle, the method further includes: If the first right cylinder stroke information is the first time and the second time, and it is determined according to the first time and the second time that the current stroke of the engine meets the initial operating condition, then the missing tooth actual position of the missing tooth is determined to be the exhaust stroke of the left cylinder of the engine, and the second left cylinder stroke information corresponding to the left cylinder of the engine of the motorcycle is obtained when the missing tooth actual position is the exhaust stroke of the left cylinder; determining, according to the second left cylinder stroke information, whether the current stroke of the engine meets a target operating condition; If it is determined that the target operating condition is met, the two-cylinder engine is controlled to perform a single fuel injection and a single ignition in each working cycle.

6. The method according to claim 4, characterized in that Also includes: If it is determined that the target operating condition is not met, the two-cylinder engine is controlled to perform two fuel injections and two ignitions in each working cycle until the current stroke meets the target operating condition.

7. A control device for a motorcycle twin-cylinder engine, characterized in that: The device comprises: A detection module, used to detect missing teeth on a motorcycle crankshaft when the motorcycle engine is in a starting condition; an information acquisition module, for determining, when the missing tooth is detected, first left cylinder stroke information corresponding to the left cylinder of the engine of the motorcycle and first right cylinder stroke information corresponding to the right cylinder of the engine of the motorcycle based on the missing tooth predicted position of the missing tooth; an information processing module, configured to determine whether a current stroke of the engine meets an initial operating condition according to the first left cylinder stroke information and the first right cylinder stroke information; The control module is used to control the two-cylinder engine to perform a single fuel injection and two ignitions in each working cycle if it is determined that the initial operating condition is met.

8. A control system for a motorcycle twin-cylinder engine, characterized in that: The invention comprises a controller, a left cylinder of the engine, a right cylinder of the engine, an injector and an ignition switch which are respectively connected to the controller in communication; the injector is connected to the left cylinder of the engine and the right cylinder of the engine, and is used to inject oil to the left cylinder of the engine and the right cylinder of the engine according to the control of the controller; the ignition switch is connected to the left cylinder of the engine and the right cylinder of the engine, and is used to ignite the left cylinder of the engine and the right cylinder of the engine according to the control of the controller; The controller is used to execute the steps of the control method of a motorcycle twin-cylinder engine according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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